xfce4-screensaver shows desktop and no login screen when waking from suspend

[Pres-Gas]

Description: Ubuntu 20.04.1 LTS
Release: 20.04

xfce4-screensaver:
  Installed: 0.1.10-0ubuntu1
  Candidate: 0.1.10-0ubuntu1
  Version table:
 *** 0.1.10-0ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu focal/universe amd64 Packages
        100 /var/lib/dpkg/status

product: 20SC000AUS (LENOVO_MT_20SC_BU_Think_FM_ThinkPad X390)
vendor: LENOVO
version: ThinkPad X390

Power management and screen saver configured as per:
https://wikinotes.presgas.name/dokuwiki/doku.php?id=robertpages:technotes:xfcelidlock

Often, when I close the lid to sleep this laptop it suspends normally. When opening the lid, the desktop shows up and I cannot interact with it and the login screen never appears.

Sometimes I close it again to suspend and then reopening will offer the login screen, but usually I have to to to a virtual tty and shut it down/restart it.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: xfce4-screensaver 0.1.10-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: XFCE
Date: Tue Sep 1 08:48:18 2020
InstallationDate: Installed on 2020-08-12 (19 days ago)
InstallationMedia: Xubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
SourcePackage: xfce4-screensaver
UpgradeStatus: No upgrade log present (probably fresh install)

[Pres-Gas (presgas)]

I thought I would further note that this really started happening since the switch away from light-locker to xfce4-screensaver. New installs offer to fix settings between the screensaver and the power management in xfce4-settings-manager.

Usually following the wiki page referenced mostly fixes it. However, there are still some machines that do it relatively frequently.

[Craig Harding (craigwharding)]

I have similar behaviour. When I close lid, it suspends normally. When I open the lid, I see a glimpse (0.5s to 1.0s duration) of my desktop but login screen shows up. But the only difference is I get the login screen show up. I assume the glimpse of the desktop is also a bug but I couldn't find it through the search. This bug could be related to 1875025: https://bugs.launchpad.net/ubuntu/+source/xfce4-screensaver/+bug/1875025/comments/24 as I've turned off the 'Enable Lock Screen' on the screensaver preferences in the meantime until 1875025 is resolved.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Damian Yerrick (tepples)]

Is this the same as bug 1881387?

[Raphael Mankin (raph-p)]

Similar. New install early Feb 2024 xubuntu 22.04

On opening the lid the screen is clearly locked. If I type the password into the invisible input box it unlocks properly. Alternatively ctl-alt-F3, login to the tty, and "pkill -9 screensaver", but then I have to re-enable the screensaver